Hand sander for flat and variously curved surfaces



May 2, 1961 c. D. TRUSSELL. 2,982,059

HAND SANDER FOR FLAT AND VARIoUsLY cURvED suRFAcEs Filed DeG- 15, 1958 INVENTOR. 62 aff/V65 7. z/ssE/.L

specification. i Y

United, States Patent O n HAND SANDER FOR FLAT AND VARIOUSLY CURVED SURFACES Clarence D. Trussell, P.O. Box 1112i, Pine Castle, Fla. ruled Dec. 1s, 195s, ser. 10,180,404

2 claims. (ci.A `s11s1) a hand sander in which the sandpaper will be automatically gripped and held on the holder and in which the sandpaper may be quickly and easily placed on and be removed from the holder and be turned around to various positions to provide fresh rubbing surfaces after a portion has become worn with use. v

These-and other desirable objects have been attained by constructing the holder in a tubular open sided form of U-shaped cross section `and providing the sandpaper in the form of a close fitting sleeve which can be, slid endwise over the holder into position bridging the open side of the holder and providing thereby a stretch of the sandpaper which will yield to conform itself to variously curved'surfaces. Y Y

Other features and advantages ofthe invention are set forth and will appear in the course ofthe following The drawing accompanying` and forming part of the specification illustrates a .presentpractcal embodiment of the invention. l v

It will be appreciated however that structure may be modified-and changed as regards thel immediate illustration all within the true intent and scope of the invention as hereinafter defined and claimed.

Fig'. lV in the.y drawing is al perspective View illustrating j the sander as in use in rubbing a rounded object such as the rung of a chair or the like.

Fig. 2 is an enlarged perspective and part broken vievv illustrating `the invention. f p v Fig. 3: is a cross sectional view as onsubstantially the plane of line 3-3 of Fig. 2.

1Fig. 4 is an end View showing in broken and full lines how the sides of the U-shaped holder may collapse vmore Y a j or less 4to permit sagging of the unsupported side of the sandpaper to t'the curvature of an object.

In the drawing the holder is shownl as an open troughshapedobject, of vsubstantially U-shapedcross section and of a size to be conveniently gripped Vin the Vfingersv of a hands l' .This Vholder maybe-ofsheetimetah plastic, wood, i cardboard or other, stiff but somewhatlilekible'and re- Y silient material.`

ice

The outer corners and edges of this U-shaped form maybe slightly rounded or beveled as indicated at 10 to avoid cutting or wearing the sandpaper and to facilitate slipping the sandpaper into position Vor removing it from the holder.

The sandpaper is in the form of a sleeve 11 of a size to closely fit over the holder. It is shown as consisting of a single piece havingthe ends abuttedV in engagement at 12 and secured in this form by an underlying layer of tape 13, preferably adhesively secured to the sandpaper and of a width and length substantially equal to the side of the holder. This provides substantial support for and securing of the meeting edge portions and avoids any seams or unevenness in the sandpaper surface.

In practice the sandpaper sleeve may be slipped over wall 7 of the holder as shown in Figs. 2, 3 and 4. This leaves the double thickness layer over the at back of the holder and a single thickness layer of sandpaper at 14 over the open side of the holder in position to bend as required to fit over any rounded surfaces such as that indicated at 15. Ordinarily the bridging portion 14 will be held substantially ilat as shown in Fig. 3, more or less tensioned by the yielding side Walls 8 and 9, but free to be deflected as required to iit differently shaped surfaces. The three other sides of the holder provide at, fullysupported sandpapering surfaces so the holder may be turned over from one side to another for any 'flat surface work or be used at the open side for variously curved or other than simply at surfaces. l

By shifting'the sleeve around on the holder from one side to another all four faces of the sleeve may be used at the open sideV or be used onV the closed sides of the holder.

lf extra strength or stiffness of sandpaper is desired for curved or other such Work the sleevemay be positioned on the holder with the double thickness or rein- `forced portion 13 across the open side of the holder.

The invention thus can be adjustedrand used in many different ways;

The U-shaped holder is light but strong and quite inexpensive.v

The sandpaper sleevesA may be made upa-at low coston folding and pasting machines and may b`e` packed and shipped in flat folded form ready to be opened up vand slipped over the holders.

` tially square cross section channel stock which may be Light 'gauge sheet aluminum .has been found 'very satisfactory, this material in strip form beingj readilyY rolled, stamped or otherwise shaped to provide the de-` sired U-shape cross section madelup of theV back wall l i 7 and-connected resilient side -wallls A9,; `f'. j [ff cut any desired lengths.

These channel `shaped holders of more or less springy material .may have the sides sprung open ysomewhat to exert Ja definite spring holding vgrip on the sleeve toA prevent longitudinal slipping of the sleeve while in use,

Also, rit is contemplated that the free edges of the sidewalls may benotched slightly, roughened or barbed to exert aV definite holding on the sleeve to seat and secure the sleeve against longitudinalrslippag'e.

In this simple one-piece construction any` need of Special holding means Vfor the ysandpaper is eliminated,

What is claimed is:y v

.1. A hand sander forr'ubbingeither ilat or rounded surfaces. comprising a three sided holder of hand gripl ysize and ofspringy material having VVtwo substantially parallel spaced `side Walls connectedin substantiallymparallell spaced apart relation by a back wall formingan inverted U-shaped open channel'and a correspondingly j I quadrangulanshaped four?sided'sleeve of flexible rub .hing .material ,engaged Aover and closely fitting said channel shaped holder in position with one side of the same bridging the spaced side walls at the open side of the holder and normally held in tension by the springy character of the holder whereby said bridging portion of the flexible rubbing material may be yieldinglyupressed over a rounded object, the three sides of the holder and the space at the open side of the holder being substantially equal in size so that the correspondingly shaped sleeve may be slipped into position over the holder with any one of the four sides of the same bridging the open side of the holder for use on a rounded object, leaving the other three sides of lthe sleeve for rubbing at surfaces and said holder exerting expanding tension on the surrounding sleeve to retain the latter in position thereon for normal rubbing operations.

2. A hand sander for rubbing either flat or rounded surfaces comprising a three sided holder of hand grip size and of springy material having two substantially parallel spacedside walls connected in substantially parallel spaced apart relation by a back wall forming an inverted U-shaped open channel and a correspondingly quadrangular shaped four sided sleeve of exible rubbing material engaged over and closely fitting said channel shaped holder in position with one side of the same bridging the spaced side walls at the open side of the holder and normally ,held in tension by the springy character of the holder whereby said bridging portion of the flexible rubbing material may be yieldingly pressed over a rounded object.

References Cited in the tile of this patent UNITED STATES PATENTS 1,927,574 Parks Sept. 19, 1933 2,076,311 White Apr. 6, 1937 2,132,889 Ayres Oct. 11, 1938 

